add SPE figure v5

content/09.peptide-purification.md

@@ -35,7 +35,7 @@ This can be performed with the aid of positive or negative pressure to ensure a
 In this step molecules bind the adsorbent and interferences pass through. 
 Next, the column is washed with the mobile phase to eliminate the contaminants while ensuring the analyte remains bound. 
 Finally, peptides are eluted in an appropriate buffer solution with polarity or charge that competes with interaction with the solid phase. 
-](images/SPE_v04.png){#fig:SPE tag="5" width="100%"}
+](images/SPE_v05.png){#fig:SPE tag="5" width="100%"}
 
 #### Specific Types of peptide purification
 There are many additional peptide purification methods that are commonly used in proteomics currently.